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Silver 3.5 inch bare hard drive with circuit board visible

Seagate

Seagate ST3320820ACE 320GB 7200 RPM 8MB Cache IDE Ultra ATA100 3.5" internal hard drive

SKU CH-5W8V-YY1C4 MPN ST3320820ACE

A 320 GB 7200 RPM 3.5 inch IDE hard drive with 8 MB cache for desktop storage

  • Total capacity320 GB
  • Interface typeIDE Ultra ATA100 / ATA-6
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory8 MB
  • 320 GB capacity stores large DVR recordings
  • 7200 RPM spindle speed provides responsive video streaming
  • 8 MB cache buffers bursts for smooth playback
  • IDE Ultra ATA100 interface fits legacy desktop systems
  • 5 inch form factor mounts in standard drive bays

320 GB IDE drive for legacy desktops

This Seagate DB35 Series 7200.3 hard drive provides 320 GB of storage on a 3.5 inch form factor. It is intended for older desktop systems that still use a parallel ATA interface. The bare-drive packaging means no cables or brackets are included.

IDE Ultra ATA100 interface requirement

The drive connects through an IDE Ultra ATA100 / ATA-6 interface, which is the single specification that determines compatibility. Motherboards without a native IDE port cannot use this drive without an adapter.

DynaPlay and DriveTrust features for DVR use

DynaPlay technology optimises video streaming performance and power usage for digital video recorder workloads. DriveTrust technology adds content-security functions for digital rights management. These features benefit DVR appliances but do not affect standard desktop file storage.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $58.99
Cheaper than about 71% of the 4,938 comparable items (median $107.99).
Total capacity 320 GB
Lower than about 87% of the 2,372 comparable items (median 2 TB).
Price per TB $184.34 per TB
Pricier than about 76% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineDB35 Series 7200.3
Model nameST3320820ACE
Total capacity320 GB
Performance
Rotational speed7,200 RPM
Storage
Cache memory8 MB
Ports & slots
Interface typeIDE Ultra ATA100 / ATA-6
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size203 × 152 × 51 mm

Questions about this item

How does the 7200 RPM speed affect performance in a desktop PC?

The 7200 RPM spindle provides faster data access than slower drives, reducing load times for the operating system and applications on this 320GB unit.

What does the IDE Ultra ATA100 interface limit in practice?

The IDE Ultra ATA100 interface caps the maximum transfer rate at 100 MB/s, so the drive cannot exceed that bandwidth even if the platters are faster.

Will this 3.5 inch bare drive fit a standard desktop drive bay?

Yes, the 3.5 inch form factor matches standard desktop internal bays and uses the traditional IDE data and Molex power connectors.

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